window.onload=function (){
    //导航栏的下拉
    var dropdown=document.getElementById("dropdown")
    var dropdownLi=dropdown.getElementsByTagName("li")

  //循环遍历
    for (var i = 0; i <dropdownLi.length; i++) {
        if(i==1){
            continue;
        }//当i=1时，跳过
        dropdownLi[i].onmouseover = function () {
            this.classList.add("show")
        }
        dropdownLi[i].onmouseout = function () {
            this.classList.remove("show")
        }
    }
     var dropright=document.getElementById("dropright")
     var droprightLi=dropright.getElementsByTagName("li")

    console.log(dropright)

}
